It seems grammatically correct to me.
A or B. Sorry can’t give a direct answer but hopefully this helps a bit
The first one. Una Ventana. It’s grammatically correct
<h2>Correct answer:</h2><h3>Laura tiene tantos vestidos como Paula.</h3>
Here we use <em>comparison of equality, </em>so this just as Tan...como conveys the idea of as … as. This is used when referring that two nouns are equal to one another. To compare two nouns using another noun, we use the formula:
<em>tanto + noun + como </em>
So vestidos is a masculine plural noun. Finally, this sentence means:
<em>Laura has as many dresses as Paula.</em>